Printable Hard Sudoku

Set 11bvk1d. 8 puzzles with an answer key, ready to print.

Hard puzzles start with about 29 givens and need real techniques: pointing pairs, naked pairs and hidden pairs. Paper is a great way to practice them, because you have to keep your own notes honest.

Each free PDF has 8 puzzles, four to a page on US Letter paper, plus an answer key with every solution. Every puzzle has exactly one solution. A new set appears here every day, or you can grab a different set any time.

Puzzles in this set

Hard #1
1 7 3 2
7 2 4 6 3
8
6 9 4
9 6 2 1
4 8
3 7
1 4 5 6
9 7 5 8
Hard #2
6 4
3 8 4
5 1 7 9
6 5 7
5 7 2 3
1 9
4 1 3 6
1 9 7 8
5 3 1
Hard #3
1 7 3 5 9
9 6 5 8
3 2 4
6 4 2 8
7 8 2 3
3 2 8 9
4 1
9 6 7
Hard #4
1 5 8 2
7 6
7 3 4 5
2 9
4 7 1
8 1 9 2
3 5 4 2
8 1 2
7 8 9
Hard #5
4 7 2 1
6 5 8
2 1
7 6 8 5 9
6
3 8 4
4 6 3
2 9 8
8 9 1 7 5
Hard #6
7 9 4 6 8
7 5
1 2 7
6 1 5
1 5 3
4 7 1 2 9
6 5 8
9 3 2 4 1
Hard #7
6 3 4
1 2 8 3 9
7 5 1
5 2 3
8 2
3 4 7
2 8 4 1 6
1 6
4 5 7
Hard #8
5 3
4 6 8 2
8 2 1
1 4 9
2 3 7 1 6
9 3 1 4
9 8 2
3 6
1 8 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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